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Differential measurements of jet substructure and partonic energy loss in Au + Au collisions at sNN =200 GeV

dc.contributor.authorDaugherity, M.
dc.contributor.authorDrachenberg, J. L.
dc.contributor.authorIsenhower, D.
dc.contributor.authorAdamczyk, L.
dc.contributor.authorAlekseev, I.
dc.contributor.authorBrandin, A. V.
dc.contributor.authorKhyzhniak, E.
dc.contributor.authorKochenda, L.
dc.contributor.authorKravtsov, P.
dc.contributor.authorNigmatkulov, G.
dc.contributor.authorOkorokov, V. A.
dc.contributor.authorParfenov, P.
dc.contributor.authorStrikhanov, M.
dc.contributor.authorTaranenko, A.
dc.contributor.authorАлексеев, Игорь Геннадьевич
dc.contributor.authorБрандин, Андрей Владимирович
dc.contributor.authorНигматкулов, Григорий Александрович
dc.contributor.authorОкороков, Виталий Алексеевич
dc.contributor.authorПарфенов, Петр Евгеньевич
dc.contributor.authorСтриханов, Михаил Николаевич
dc.contributor.authorТараненко, Аркадий Владимирович
dc.date.accessioned2024-12-25T16:14:32Z
dc.date.available2024-12-25T16:14:32Z
dc.date.issued2022
dc.description.abstractThe STAR collaboration presents jet substructure measurements related to both the momentum fraction and the opening angle within jets in p+p and Au+Au collisions at sNN =200GeV. The substructure observables include SoftDrop groomed momentum fraction (zg), groomed jet radius (Rg), and subjet momentum fraction (zSJ) and opening angle (θSJ). The latter observable is introduced for the first time. Fully corrected subjet measurements are presented for p+p collisions and are compared to leading-order Monte Carlo models. The subjet θSJ distributions reflect the jets leading opening angle and are utilized as a proxy for the resolution scale of the medium in Au+Au collisions. We compare data from Au+Au collisions to those from p+p which are embedded in minimum-bias Au+Au events in order to include the effects of detector smearing and the heavy-ion collision underlying event. The subjet observables are shown to be more robust to the background than zg and Rg. We observe no significant modifications of the subjet observables within the two highest-energy, back-to-back jets, resulting in a distribution of opening angles and the splittings that are vacuumlike. We also report measurements of the differential dijet momentum imbalance (AJ) for jets of varying θSJ. We find no qualitative differences in energy loss signatures for varying angular scales in the range 0.1< θSJ<0.3, leading to the possible interpretation that energy loss in this population of high-momentum dijet pairs, is due to soft medium-induced gluon radiation from a single color charge as it traverses the medium. © 2022 American Physical Society.
dc.format.extentС. 044906
dc.identifier.citationDifferential measurements of jet substructure and partonic energy loss in Au + Au collisions at sNN =200 GeV / Daugherity M. [et al.] // Physical Review C. - 2022. - 105. - P. 044906. - 10.1103/PhysRevC.105.044906
dc.identifier.doi10.1103/PhysRevC.105.044906
dc.identifier.urihttps://www.doi.org/10.1103/PhysRevC.105.044906
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dc.identifier.urihttps://openrepository.mephi.ru/handle/123456789/28160
dc.language.isoEN
dc.relation.ispartofPhysical Review C
dc.titleDifferential measurements of jet substructure and partonic energy loss in Au + Au collisions at sNN =200 GeV
dc.typeArticle
dspace.entity.typePublication
oaire.citation.volume105
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